Pole piece flattening mechanism for pole piece production

Abstract

A pole piece flattening mechanism for pole piece production comprises a crank assembly, one end of the crank assembly is rotationally connected with a driving device, the other end of the crank assembly is fixedly connected with a flattening assembly acting on the surface of a coil stock, the flattening assembly makes contact with the surface of a pole piece, and the crank assembly rotates around the central axis of the crank assembly. Linear motion of the driving device is converted into arc motion of the smoothing assembly; compared with the prior art, the crank assembly is driven by the driving device to rotate around the axis of the crank assembly in a reciprocating mode, the smoothing assembly located at the other end of the crank assembly is driven by the crank assembly to synchronously rotate around the axis of the crank assembly in a reciprocating mode, and at the moment, the displacement track of the smoothing assembly on the surface of the pole piece is arc-shaped; the flattening assembly generates different tensions at different positions of the surface of the pole piece, and the surface of the pole piece can be tensioned to remove wrinkles without limiting the position of the pole piece relative to the flattening assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece production equipment, in particular to a pole piece flattening mechanism for pole piece production. Background Technique

[0002] With the development and maturity of new energy technologies, the application of lithium batteries has become more and more extensive. In the actual production process of lithium batteries, multiple production processes are involved, and multiple different production equipment is required to complete different production processes, and finally the production work of lithium batteries is realized; if the degree of equipment automation is low, a large number of manual workers are required for auxiliary production, consuming a large amount of manpower, material resources and time costs, not only resulting in high production costs of lithium batteries, but also greatly reducing production efficiency; at the same time, manual auxiliary production is prone to human contact, introducing pollution sources and reducing the production quality of lithium batteries. For example, when the pole piece is wound up, due to the presence of blank spaces on the surface of the pole piece, the pole piece has a tension disorder phenomenon, and then the blank part of the pole piece is wrinkled, resulting in quality problems of the pole piece.

[0003] To solve the above problems, Chinese Patent No. 201820900879.9 discloses a battery pole piece winding and flattening device. The disclosed battery pole piece winding and flattening device flattens the pole piece for the first time through the clamping ring pressing plate on the flattening mechanism, and then generates tension on the pole piece through two flattening rollers to prevent the pole piece from wrinkling. The positions of the two flattening rollers in the above battery pole piece winding and flattening device are relatively fixed, and it is necessary to manually insert the pole piece into the correct position in the flattening device before the pole piece can be tensioned and de-wrinkled. The operation process is relatively complicated, and if the insertion position of the pole piece is incorrect, the tensioning and de-wrinkling effect of the pole piece will be affected. Utility Model Content

[0004] Aiming at the above deficiencies, the technical problem to be solved by the utility model is to provide a pole piece flattening mechanism for pole piece production, which does not require inserting the pole piece, and realizes tensioning and de-wrinkling of the surface of the pole piece by changing the position of the flattening roller, simplifying the tensioning and de-wrinkling operation.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a pole piece flattening mechanism for pole piece production, including a crank assembly, one end of the crank assembly is rotatably connected to a driving device, and the other end is fixedly connected to a flattening assembly acting on the surface of the coil material. The flattening assembly is in contact with the surface of the pole piece; the crank assembly rotates around its central axis, converting the linear motion of the driving device into the arc motion of the flattening assembly.

[0006] As a preferred scheme of the utility model, the crank assembly includes a first connecting arm, a second connecting arm and a central rotating shaft; the first connecting arm and the second connecting arm are respectively arranged at both ends of the central rotating shaft and fixedly connected to the central rotating shaft.

[0007] As a preferred embodiment of the present utility model, a rotating bearing seat is sleeved on the outer circumferential surface of the central rotating shaft.

[0008] As a preferred embodiment of the present utility model, both the first connecting arm and the second connecting arm are perpendicular to the central rotating shaft, and an included angle is formed between the first connecting arm and the second connecting arm.

[0009] As a preferred embodiment of the present utility model, the driving device includes a driving cylinder, a cylinder push rod, and a spherical eye joint connected in sequence; the spherical eye joint is flexibly connected to the crank assembly.

[0010] As a preferred embodiment of the present utility model, a mounting and fixing seat is arranged at one end of the driving cylinder away from the spherical eye joint.

[0011] As a preferred embodiment of the present utility model, the flattening assembly includes a flattening roller and a flattening roller fixing bracket, and the flattening roller is rotatably arranged on the flattening roller fixing bracket.

[0012] As a preferred embodiment of the present utility model, the flattening roller fixing bracket includes a connecting rod, one end of the connecting rod is connected to the crank assembly, the other end is connected to a fixing plate, and limiting blocks are arranged at both ends of the fixing plate.

[0013] As a preferred embodiment of the present utility model, the fixing plate is perpendicular to the connecting rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: the crank assembly rotates reciprocally around its own axis under the drive of the driving device, and the flattening assembly located at the other end of the crank assembly rotates synchronously around the axis of the crank assembly under the drive of the crank assembly; at this time, the displacement trajectory of the flattening assembly on the surface of the pole piece is arc-shaped, and different tensions are generated at different positions of the flattening assembly on the surface of the pole piece. Without restricting the position of the pole piece relative to the flattening assembly, the surface of the pole piece can be tensioned and wrinkled removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of a pole piece flattening mechanism for pole piece production provided by an embodiment of the present application;

[0016] Figure 2 FIG. is a schematic structural diagram of the crank assembly provided by an embodiment of the present application;

[0017] Figure 3 FIG. is a schematic structural diagram of the flattening roller fixing bracket provided by an embodiment of the present application;

[0018] Reference numerals: crank assembly 1, first connecting arm 1-1, second connecting arm 1-2, central rotating shaft 1-3, rotating bearing seat 1-4, driving device 2, driving cylinder 2-1, cylinder push rod 2-2, spherical eye joint 2-3, mounting and fixing seat 2-4, flattening assembly 3, flattening roller 3-1, flattening roller fixing bracket 3-2, connecting rod 3-21, fixing plate 3-22, limiting block 3-23. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0020] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the described elements without departing from the scope of the content of the present application. Various processes or components may be appropriately omitted, substituted, or added to each example. For example, the described methods may be performed in a different order than the described order, and various steps may be added, omitted, or combined. In addition, the features described in some examples may be combined into other examples.

[0021] Please refer to Figure 1 , Figure 1 which shows a schematic structural diagram of a pole piece flattening mechanism for pole piece production provided by an embodiment of the present application. As Figure 1 shown, a pole piece flattening mechanism for pole piece production includes a crank assembly 1. One end of the crank assembly 1 is rotatably connected to a driving device 2, and the other end is fixedly connected to a flattening assembly 3 acting on the surface of the coiled material. The flattening assembly 3 is in contact with the surface of the pole piece; the crank assembly 1 rotates around its central axis, converting the linear motion of the driving device 2 into an arc motion of the flattening assembly 3.

[0022] Specifically, a driving device 2 is arranged at one end of the crank assembly 1. The crank assembly 1 reciprocally rotates around its own axis under the drive of the driving device 2. The flattening assembly 3 located at the other end of the crank assembly 1 synchronously reciprocally rotates around the axis of the crank assembly 1 under the drive of the crank assembly 1; at this time, the displacement trajectory of the flattening assembly 3 on the surface of the pole piece is an arc, and different tensions are generated at different positions of the flattening assembly 3 on the surface of the pole piece. Without restricting the position of the pole piece relative to the flattening assembly 3, the surface of the pole piece can be tensioned and wrinkle-removed.

[0023] Preferably, the crank assembly 1 includes a first connecting arm 1-1, a second connecting arm 1-2 and a central rotating shaft 1-3. The first connecting arm 1-1 and the second connecting arm 1-2 are respectively arranged at both ends of the central rotating shaft 1-3 and fixedly connected to the central rotating shaft 1-3. One end of the first connecting arm 1-1 far from the central rotating shaft 1-3 is rotatably connected to the driving device 2, and one end of the second connecting arm 1-2 far from the central rotating shaft 1-3 is fixedly connected to the smoothing assembly 3. A rotating bearing seat 1-4 is sleeved on the outer circumferential surface of the central rotating shaft 1-3, and the central rotating shaft 1-3 is fixed to the external frame through the rotating bearing seat 1-4. When the driving device 2 drives the first connecting arm 1-1 to perform circumferential movement around the central rotating shaft 1-3, the second connecting arm 1-2 synchronously performs circumferential movement around the central rotating shaft 1-3 driven by the central rotating shaft 1-3.

[0024] Preferably, both the first connecting arm 1-1 and the second connecting arm 1-2 are perpendicular to the central rotating shaft 1-3, and the projections of the first connecting arm 1-1 and the second connecting arm 1-2 in the axial direction of the central rotating shaft 1-3 intersect, forming an angle between the two projections.

[0025] Further, the smoothing roller 3-1 on the smoothing assembly 3 is parallel to the central rotating shaft 1-3.

[0026] Preferably, the driving device 2 includes a driving cylinder 2-1, a cylinder push rod 2-2 and a spherical eye joint 2-3 connected in sequence. An installation and fixing seat 2-4 is arranged at one end of the driving cylinder 2-1 far from the spherical eye joint 2-3, and the driving cylinder 2-1 is fixed to the external frame through the installation and fixing seat 2-4. The spherical eye joint 2-3 is flexibly connected to the crank assembly 1, so that when the driving device 2 drives the crank assembly 1, the spherical eye joint 2-3 can deflect relative to the crank assembly 1 in the axial direction and the radial direction, avoiding jamming between the crank assembly 1 and the driving device 2 and causing the crank assembly 1 to be unable to rotate.

[0027] Preferably, the smoothing assembly 3 includes a smoothing roller 3-1 and a smoothing roller fixing bracket 3-2. The smoothing roller 3-1 is rotatably arranged on the smoothing roller fixing bracket 3-2. When the smoothing roller 3-1 tensions and removes wrinkles on the surface of the pole piece, the smoothing roller 3-1 can roll relative to the surface of the pole piece, reducing the damage caused to the surface of the pole piece by the frictional resistance.

[0028] Preferably, the smoothing roller fixing bracket 3-2 includes a connecting rod 3-21. One end of the connecting rod 3-21 is connected to the crank assembly 1, and the other end is connected to a fixing plate 3-22. Limiting blocks 3-23 are arranged at both ends of the fixing plate 3-22, and both ends of the smoothing roller 3-1 are rotatably connected to the limiting blocks 3-23 at both ends of the fixing plate 3-22.

[0029] Preferably, the flattening roller 3-1 is parallel to the fixing plate 3-22, the fixing plate 3-22 is perpendicular to the connecting rod 3-21, the connecting rod 3-21 is parallel to the second connecting arm 1-2, and the second connecting arm 1-2 is perpendicular to the central rotating shaft 1-3. Therefore, the flattening roller 3-1 can be parallel to the central rotating shaft 1-3 and rotate around the central rotating shaft as the rotation center.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0031] Although the terms such as crank assembly 1, first connecting arm 1-1, second connecting arm 1-2, central rotating shaft 1-3, rotating bearing seat 1-4, driving device 2, driving cylinder 2-1, cylinder push rod 2-2, spherical eye joint 2-3, mounting and fixing seat 2-4, flattening assembly 3, flattening roller 3-1, flattening roller fixing bracket 3-2, connecting rod 3-21, fixing plate 3-22, limiting block 3-23 and the like are used more frequently in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A pole piece flattening mechanism for pole piece production, characterized in that It includes a crank assembly (1). One end of the crank assembly (1) is rotatably connected to a driving device (2), and the other end is fixedly connected to a flattening assembly (3) acting on the surface of the coiled material. The flattening assembly (3) is in contact with the surface of the pole piece. The crank assembly (1) rotates around its central axis, converting the linear motion of the driving device (2) into the arc motion of the flattening assembly (3).

2. The pole piece flattening mechanism for pole piece production according to claim 1, characterized in that, The crank assembly (1) includes a first connecting arm (1-1), a second connecting arm (1-2) and a central rotating shaft (1-3). The first connecting arm (1-1) and the second connecting arm (1-2) are respectively arranged at both ends of the central rotating shaft (1-3) and fixedly connected to the central rotating shaft (1-3).

3. The flattening mechanism for pole pieces used in pole piece production according to claim 2, characterized in that, A rotating bearing seat (1-4) is sleeved on the outer circumferential surface of the central rotating shaft (1-3).

4. The leveling mechanism for a pole piece production according to claim 2, characterized in that, Both the first connecting arm (1-1) and the second connecting arm (1-2) are perpendicular to the central rotating shaft (1-3), and an included angle is formed between the first connecting arm (1-1) and the second connecting arm (1-2).

5. The leveling mechanism for a pole piece used in pole piece production according to claim 1, characterized in that, The driving device (2) includes a driving cylinder (2-1), a cylinder push rod (2-2) and a spherical eye joint (2-3) connected in sequence. The spherical eye joint (2-3) is flexibly connected to the crank assembly (1).

6. The sheet flattening mechanism for sheet production according to claim 5, characterized in that, An installation fixing seat (2-4) is arranged at one end of the driving cylinder (2-1) away from the spherical eye joint (2-3).

7. The flattening mechanism for a pole piece used in pole piece production according to claim 1, characterized in that, The flattening assembly (3) includes a flattening roller (3-1) and a flattening roller fixing bracket (3-2). The flattening roller (3-1) is rotatably arranged on the flattening roller fixing bracket (3-2).

8. The flattening mechanism for a pole piece used in pole piece production according to claim 7, characterized in that, The flattening roller fixing bracket (3-2) includes a connecting rod (3-21). One end of the connecting rod (3-21) is connected to the crank assembly (1), and the other end is connected to a fixing plate (3-22). Limiting blocks (3-23) are arranged at both ends of the fixing plate (3-22).

9. The flattening mechanism for a pole piece used in pole piece production according to claim 8, characterized in that, The fixing plate (3-22) is perpendicular to the connecting rod (3-21).

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